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сс13xx: others data rates

Victor Pushkarev
Prodigy 90 points
Other Parts Discussed in Thread: CC1310

Hello,

At the moment (link), the maximum supported data rate for cc1310 module is 50kbps (configured at SmartRF Studio).

Do you have any RF settings (e.g. smartrf_settings file)  to provide data rate 500kbps and more?

Thanks.

Victor

  • 0
    TI__Guru**** 317180 points
    With the prop API datarates up to 500 kbps is supported. For higher datarates the HS API has to be used. The PER test containing the HS Mode will be available in the TI-RTOS release scheduled for mid June.
  • 0 in reply to TER
    Prodigy 90 points
    Ok, but how to configure the module with datarate to 500kbps? What values (e.g. of prescale, rateword, rxBw or some other) should be set in the smartrf_settings file for such datarate?
  • 0 in reply to Victor Pushkarev
    TI__Guru**** 317180 points
    Type in the datarate and deviation you want to use and SmartRF Studio calculate and export the code settings for you.

    Rx Bw is dependent on the xtal accuracy in your system.

    Required RX filter bandwidth can be approximated as :Signal BW + 4*ppm xtal*Frequency of operation , where Signal BW of = Data rate + 2 x frequency deviation.

    Example: 38.4 kbps data rate and +/-19.2 kHz deviation gives Signal BW of38.4 + 2 x 19.2 = 76.8 kHz
  • 0 in reply to TER
    Prodigy 90 points
    For datarate to 500kbps I calculated such parameters as:

    .symbolRate.preScale = 0x6,
    .symbolRate.rateWord = 0x10000,
    .rxBw = 0x2c,

    What about of parameter names as .modulation.deviation? How is it calculated?
  • 0 in reply to Victor Pushkarev
    TI__Genius 9705 points
    Hello Victor,

    As TER has suggested, the best way to obtain these settings for CC13xx is to export settings from SmartRF studio after all the parameters are set. Modulation deviation is programmed in steps of 250 Hz. For example, for 175 KHz deviation, the setting should be 0x2BC (175000= 700*250). Also, please re-check your rate word settings, for 500Kbps and prescaler value of 6, this should be 0x20000.

    Regards,